<template>
  <el-menu default-active="1-4-1" class="el-menu-vertical-demo" background-color= "#545c64" text-color="#fff" active-text-color="#ffe04b" @open="handleOpen" @close="handleClose" :collapse="isCollapse">
    <h3>{{isCollapse ? '后台' : '后台通用管理系统'}}</h3>
    <el-menu-item @click="Changerouter(item)" v-for="item in noChildren" :index="item.path" :key="item.path">
        <i :class="'el-icon-'+item.icon"></i>
        <span slot="title">{{item.lable}}</span>
    </el-menu-item>
    <el-submenu v-for="item in hasChildren" :index="item.path" :key="item.path">
        <template slot="title">
        <i :class="'el-icon-' + 'item.icon'"></i>
        <span slot="title">{{item.lable}}</span>
        </template>
        <el-menu-item-group v-for="(subsitem,subsindex) in item.children" :key="subsitem.path">
        <el-menu-item @click="Changerouter(subsitem)" :index="subsindex">{{subsitem.lable}}</el-menu-item>
        
        </el-menu-item-group>
    </el-submenu>
</el-menu>

</template>

<script>
  export default {
    data() {
      return {
        menu:[
            {
                path:'/',
                name: 'home',
                lable:'首页',
                icon:'s-home',
                url:'Home/Home'
            },
            {
                path:'/mall',
                name: 'mall',
                lable:'商品管理',
                icon:'video-play',
                url:'MallManage/MallManage'
            },
            {
                path:'/users',
                name: 'users',
                lable:'用户管理',
                icon:'user',
                url:'UsersManage/UseersManage'
            },
            {
                lable:'其他',
                icon:'location',
                children:[
                    {
                    path:'/page1',
                    name: 'page1',
                    lable:'页面1',
                    icon:'setting',
                    url:'Other/PageOne'
                },
                {
                    path:'/page2',
                    name: 'page2',
                    lable:'页面2',
                    icon:'setting',
                    url:'Other/PageTwo'
                }
                ]
            }
        ]
      };
    },
    methods: {
      handleOpen(key, keyPath) {
        console.log(key, keyPath);
      },
      handleClose(key, keyPath) {
        console.log(key, keyPath);
      },
      Changerouter(item){
          this.$router.push({
              name:item.name
          }),
          this.$store.commit('selectMenu',item)
      }
    },
    computed:{
        noChildren(){
            return this.menu.filter(item => !item.children)
        },
        hasChildren(){
            return this.menu.filter(item => item.children)
        },
        isCollapse(){
          return this.$store.state.tab.isCollapse
        }
    }

  }
</script>

<style lang="less" scoped>
  .el-menu-vertical-demo:not(.el-menu--collapse) {
    width: 200px;
    min-height: 400px;
  }
  .el-menu{
      height: 100%;
      border: none;
      h3{
          color: #fff;
          text-align: center;
          line-height: 48px;
      }
  }
</style>